The only reasonable commercial license to have on an open source friendly project is the Business Source License which MariaDB created and which eg. Sentry has

The only reasonable commercial license to have on an open source friendly project is the Business Source License which MariaDB created and which eg. Sentry has adopted as well. That license will always to resolve to a GPL-compatible license after at most 4 years after release, ensuring that even if the creator goes out of business, the code will always be forkable eventually. More info: https://perens.com/2017/02/14/bsl-1-1/ https://perens.com/2017/02/14/bsl-1-1/